<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <ul>
            <li v-for="(item,index) in list">
                {{item}}
                <button @click="del">删除</button>
            </li>
            <button @click="add">生成</button>
        </ul>
    </div>
    <script src="../vue.js"></script>
    <script>
       new Vue({
        el: '#app',
            data:{  
                list:[1,3,5,7],
                
            },
            methods:{
                add() {
                        this.list.push(Math.floor(Math.random() * 21))
                },
                del(index){
                    this.list.splice(index,1)
                }
            }
        })
    </script>
</body>
</html>